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      <h2><a href="./">Go by Example 中文版</a>: 排序</h2>
      
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            <p>Go 的 <code>sort</code> 包实现了内建及用户自定义数据类型的排序功能。
我们先来看看内建数据类型的排序。</p>

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            <a href="http://play.golang.org/p/R3cwByvtmp3"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
          <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
</pre></div>

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          <div class="highlight"><pre><span class="kn">import</span> <span class="p">(</span>
    <span class="s">&quot;fmt&quot;</span>
    <span class="s">&quot;sort&quot;</span>
<span class="p">)</span>
</pre></div>

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          <div class="highlight"><pre><span class="kd">func</span> <span class="nx">main</span><span class="p">()</span> <span class="p">{</span>
</pre></div>

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            <p>排序方法是针对内置数据类型的；
这是一个字符串排序的例子。
注意，它是原地排序的，所以他会直接改变给定的切片，而不是返回一个新切片。</p>

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          <div class="highlight"><pre>    <span class="nx">strs</span> <span class="o">:=</span> <span class="p">[]</span><span class="kt">string</span><span class="p">{</span><span class="s">&quot;c&quot;</span><span class="p">,</span> <span class="s">&quot;a&quot;</span><span class="p">,</span> <span class="s">&quot;b&quot;</span><span class="p">}</span>
    <span class="nx">sort</span><span class="p">.</span><span class="nx">Strings</span><span class="p">(</span><span class="nx">strs</span><span class="p">)</span>
    <span class="nx">fmt</span><span class="p">.</span><span class="nx">Println</span><span class="p">(</span><span class="s">&quot;Strings:&quot;</span><span class="p">,</span> <span class="nx">strs</span><span class="p">)</span>
</pre></div>

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            <p>一个 <code>int</code> 排序的例子。</p>

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          <div class="highlight"><pre>    <span class="nx">ints</span> <span class="o">:=</span> <span class="p">[]</span><span class="kt">int</span><span class="p">{</span><span class="mi">7</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">4</span><span class="p">}</span>
    <span class="nx">sort</span><span class="p">.</span><span class="nx">Ints</span><span class="p">(</span><span class="nx">ints</span><span class="p">)</span>
    <span class="nx">fmt</span><span class="p">.</span><span class="nx">Println</span><span class="p">(</span><span class="s">&quot;Ints:   &quot;</span><span class="p">,</span> <span class="nx">ints</span><span class="p">)</span>
</pre></div>

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            <p>我们也可以使用 <code>sort</code> 来检查一个切片是否为有序的。</p>

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          <div class="highlight"><pre>    <span class="nx">s</span> <span class="o">:=</span> <span class="nx">sort</span><span class="p">.</span><span class="nx">IntsAreSorted</span><span class="p">(</span><span class="nx">ints</span><span class="p">)</span>
    <span class="nx">fmt</span><span class="p">.</span><span class="nx">Println</span><span class="p">(</span><span class="s">&quot;Sorted: &quot;</span><span class="p">,</span> <span class="nx">s</span><span class="p">)</span>
<span class="p">}</span>
</pre></div>

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            <p>运行程序，打印排序好的字符串和整型切片，
以及数组是否有序的检查结果：<code>true</code>。</p>

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          <div class="highlight"><pre><span class="gp">$</span> go run sorting.go
<span class="go">Strings: [a b c]</span>
<span class="go">Ints:    [2 4 7]</span>
<span class="go">Sorted:  true</span>
</pre></div>

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        下一个例子: <a href="sorting-by-functions">使用函数自定义排序</a>
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